electrical engineering MCQs – Page 179

Practise multiple-choice questions from electrical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

electrical engineering Mcqs
1. economics of power generation2. analog electronics3. solid state switching circuits4. parallel circuits5. switchgear and protection6. op amp circuits7. transistor audio power amplifiers8. electrostatics9. heating and welding10. multi stage transistor amplifiers11. passive filters12. network theorems13. regulated d c power supply14. a c fundamentals circuits and circuit theory15. electromagnetic induction16. power electronics17. magnetism and electromagnetism18. transformers19. modulation and demodulation20. d c generators21. semiconductor theory22. single phase induction motors23. semiconductor diode24. hybrid parameters25. digital electronics26. oscillators27. earthing or grounding28. single stage transistor amplifiers29. d c motors30. transistor biasing31. amplifiers with negative feedback32. basic electrical33. electronic instruments34. synchronous motors35. field effect transistors fet36. magnetic circuit37. control systems38. industrial drives39. power generation40. series parallel circuits41. transistor tuned amplifiers42. electrical engineering materials43. rectifiers and converters44. integrated circuits45. scr silicon controlled rectifiers46. cables47. polyphase induction motors48. measurement and instrumentation49. transistors50. electrical machine design51. electrolysis and storage of batteries52. electric traction53. transmission and distribution
3561. At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V.the filters bandwidth is____________?
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A. 53 Hz

B. 530 Hz

C. 106 Hz

D. 11.5 Hz

3562. Class C amplifiers are used as ___________________?
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A. AF amplifiers

B. Detectors

C. None of the above

D. amplifiers
3563. Potential difference is the work done in moving unit positive charge form one point to another________________?
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A. in any direction

B. against electric intensity

C. in the direction of electric flux

D. in the direction of electric intensity

3564. In a certain low-pass filter, fc = 3.5 kHz.if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?
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A. 5.97 V

B. 597 mV

C. 0 V

D. 6 V

3565. On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
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A. 1,000 V

B. 500 V

C. 1 V

D. 50 V

3566. The output of a microphone is rated at -52 db. The reference level is 1V under specified conditions. What is the output voltage of this microphone under the same sound conditions?
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A. 5 mV

B. 2 mV

C. 5 mV

D. 8 mV

3567. The number of stages that can be directly coupled is limited because___________?
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A. Changes in temperature cause thermal instability

B. It becomes difficult to bias the circuit

C. None of the above

D. Circuit becomes heavy and costly

3568. The bandwidth of a single stage amplifier is_____________that of a multistage amplifier?
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A. Less than

B. More than

C. Data insufficient

D. The same as

3569. A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy_______________?
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A. 100 eV

B. 200J

C. 100J

D. 1000J

3570. In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________________?
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A. Short

B. Partially open

C. Open

D. None of the above

3571. The frequency response of transformer coupling is___________?
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A. Very good

B. Excellent

C. Poor

D. Good

3572. The disadvantage of impedance matching is that it _______________?
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A. Requires a transformer

B. Gives distorted output

C. None of the above

D. Gives low power output

3573. If the zero signal dissipation of a transistor is 1W, then power rating of the transistor should be at least___________________?
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A. 5 W

B. 75 W

C. 33 W

D. 1 W
3574. Which one of the following devices does not function like an electric motor ?
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A. Transformer

B. Ammeter

C. Galvanometer

D. Voltmeter

3575. An amplifier has a power gain of 100. Its db gain is ________________?
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A. None of the above

B. 20 db

C. 40 db

D. 10 db

3576. If the distance between the two point charges become half then force between them becomes______________?
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A. remains same

B. half

C. double

D. four times
3577. A certain voltage divider consists of two 12 k? resistors in series. Which of the following load resistors will have the most effect on the output voltage?
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A. 18 k?

B. 24 k?

C. 1 M?

D. 12 k?
3578. For electroplating we use_________________?
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A. an A.C source

B. all of the above

C. any source

D. A D.C source
3579. An RL high-pass filter consists of a 470 ? resistor and a 600 mH coil. The output is taken across the coil. The circuits critical frequency is___________?
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A. 125 Hz

B. 564 Hz

C. 5,644 Hz

D. 1,250 Hz

3580. Which of the following uses electric energy and does not convert it into any other form ?
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A. transformer

B. D.C generator

C. A.C generator

D. motor